Testing device



July 13, 1937. E. H. cox

' TESTING DEVICE Filed Aug. 27, 1936 Inventor Ervefsf 'Cox forncys Cil `for testing oil and Patented July 13, 1.937

UNITED STATES PATENT OFFICE y' 5 Claims.

This invention is a device'particularly designed n l gas wells and the object of the invention is to provide a device of this charor fluid encountered or penetrated by the rotary drill bit.

useful improvements over that testing deviceV forming the subject of my copending patent ap I plication Serial No. 66,482, ii'led February 29, 1936,

and entitled Testing device. I

The present invention, together with its objects and advantages will `be best understood from a study of the following description taken in connection with the accompanying vdrawing Figure 1 is an elevational view illustrating the application of the invention.

Figure 2 is a longitudinal sectional view therethrough.

Figure 3 is an holder with partsl broken away and shown in section. Figure 4 is a longitudinal view through a sleeve forming part of the invention and Figure 5 is a perspective view of a valve seat.

Referring` to the drawing yin detail it will be seen that in the preferred embodiment the testing device comprises a sleeve 5 provided intermediate its endswith internal threads 6, and at its upper end with external threads 1, and external threads 'la at its lower end.

Further the device comprises a holder for samples of sand or the like and said -holder consists of a barrel 8 tapered at one end as at 9 and adv jacent said tapered end provided with threads I0 complemental to the threads that through the medium I2 said barrel is detachably connected with one end of the sections I3 of the elevational view of the sample I4 which is formed internally In addition to the barrel 8 the sample holder includes an elongated tube 23 that extends through the barrel 8 `and at one end extends beyond the end 9 vof the barrel 8 to provide a spear point 24. Above the point 24the`lower end of 5 the tube 23 is provided with perforations 25 through which the sample material enters the tube 23.

At its upper end the tube 23 extends into the string section I3 and has suitably secured to its 10 upper end as by being threaded thereon, or in any other suitable manner', a valve cage 26a in which .works a ball check valve 26.

Confined on the barrel 8 between the members I4 and I9 is a series of packer rings 21 of any suit- 15 able material spaced from one another through the medium of suitable spacer rings 28 as shown.

A perforated pipe 29 is provided and through this pipe the sample of oil, gas, salt water or the like passes from the well to pass, in a mannerhereinafter made manifestinto the lower endl of the barrel 8.

The linvention as scribed more fully pending application. 25

The present invention differs from the invention forming the subject matter of the above identified co-pending application for patent in that, in accordance withthe present invention, there is provided a short tubular valve casing 30 30 that has one end threaded into the nut lgyand a relatively. opposite end threaded for receiving a coupling sleeve 3| which sleeve is also threadedly engaged with the perforated pipe 29 for coupling the pipe 29 to the valve casing 38 as 35 clearly shown in Figures 1 and 2. f

In the lower end thereof the valve casing 30 is provided with a spider 32 forming a valve stem guide that accommodates a valve stem 33. On its upper end thevalve stem 33 is provided with 40 a frusta-'conical valve element 34 that is normally seated against the edges of the Aopening VI8 in disk I6 through the medium of a suitably provided coil spring 35. c

Further ir/ accordance with the present invention barrel 8 is provided at diametrically oppojust described has been dein my herein identified cosite sides thereof with outwardly anddownwardly extending branches 36 in which are confined outwardly opening ball check valves 3l., The branches 36 open 'into the atmosphere and are 50 provided for the circulation of mud and the like in the usual manner without contaminating the contents confined within the elongated internal tube 23 forming part of the sample holder as hereinbefore describe The operation and utility of the invention will be understood from the following:-

When the end of the perforated pipe 29 comes into contact with the bottom of the well, the drill string I3 is rotated whereby to thread the barrel 8 downwardly relative to the sleeve 5. As the barrel 8 thus moves downwardly the point 24 will pass through the opening I8 in the disk I6 to engage the valve 34 to unseat the latter against the action of spring 35.

The point 24 of the tube 23 is forced through the opening i8 downwardly to a point sufficient to provide a clearance between the point and the Wall of the opening I8 which will permit the sample of oil, gas, or the like to flow upwardly and around the point 24 into thelower portion of the sleeve 5. When this has been accomplished the barrel 8 is threaded further downwardly relative to the sleeve 5 until point 24 comes into contact with the wall of the opening I8 whereby to shut off communication between the pipe 29 and the sleeve 5. It will thus be seen that when this is accomplished the sample material or fluid within the lower end of the sleeve 5 will pass into the tube 23 through the openings 25 and will become trapped within the tube 23.

When thesample material has thus become trapped within the tube 23 a pump is connected tothe top of the drill string for pumping the drill string full of mud. This mud will pass through the branches 35 and circulate about the drill string in the usual manner but the valve 26 in the upper end of the pipe 23 will prevent any of this mud passing into the tube 23 and contaminating the sample contents of the tube.

After a sample of the oil, gas or the like has been obtained in this manner the drill string may be raised and the testing device therr uncoupled from the lower end of the drill string.

From the above it will be seen that provision has been made for obtaining a sample of oil, gas or the like in such a, manner that the sample may be brought to the surface without at any time coming in contact with any foreign substance that would tend to contaminate the sample thus obtained.

Having thus described the invention what is claimed as new isz- 1. In a device of the class described, a barrel adapted to be secured to the lower end of a drill string, a sleeve threaded on the lower end of said barrel and relative to which said barrel is axially adjustable, said sleeve having a valve seat at the lower end thereof, and a sample entrapping tube extending longitudinally through said barrel,

' being integral adjacent one end with one end of said barrel and.. having at said one end a point and perforations above the point, the point of said tube adapted to pass axially through said valve seat, and means, displaceable by contact of the pointed end of said tube therewith, arranged at the lower end of said sleeve and normally engaging said v`a1ve seat for substantially completely closing said end of said sleeve.

2. In a device of the class described, a barrel adapted to be secured to the lower end of adrill string, a sleeve threaded on the lower end of said barrel, said barrel being axially adjustable relative to said sleeve, said sleeve having an apertured valve seat-disk at the lower end thereof, a valve casing connected with the lower end of said sleeve, a valve member working in said cas- -ing and cooperating with the valve seat, a sample the largest end of they entrapping tube extending longitudinally through said barrel, being integral adjacent one end with one end of the barrel and having at said one end a point adapted to pass axially through the apertured valve seat-disk to engage said valve member for unseating the latter, and said sample entrapping tube, adjacent the pointed end thereof being perforated.

3. In a device` of the class described, a barrel adapted to be secured to the lower end of the drill string, a sleeve threaded on the lower end of said barrel, said barrel being axially adjustable relative to said sleeve, an apertured valve seatdisk, means engaging said sleeve and cooperating therewith for securing said valve seat disc to the lower end of said sleeve, a valve casing connected with the lower end of said sleeve, a valve member working in said casing and cooperating with the valve seat, a sample entrapping tube extending longitudinally through said barrel, being integral adjacent one end with one end of the barrel and having at said one end a point adapted to pass axially through the apertured valve seatdisk to engage said valve member for unseating the latter, said sample entrapping tube, adjacent the pointed end thereof being perforated, and a check valve on the upper end of the sample tube.

4. In a device of the class described, a barrel adaptedto be secured to the lower end of the drill string, a sleeve threaded on the lower end of said barrel, said barrel being axially adjustable relative to said sleeve, an apertured valve seatdisk positioned against the lower end of said sleeve, a valve casing connected with the lower end of said sleeve, a valve member working in said casing and cooperating with the valve seat, a sample entrapping tube extending longitudinally through said barrel, being integral adjacent one end with one end of the barrel and having at said one end a point adapted to pass axially through the apertured valve seat-disk to engage said valve member for unseating the latter, said sample entrapping tube, adjacent the pointed end thereof being perforated, a check valve on the upper end of the same sample tube, packing elements encircling said sleeve, and means engaged with the sleeve for securing said packing' elements in position on the sleeve.

5. In a device of the class described, a barrel adapted to be secured to the lower end of the drill string, a sleeve threaded on the lower end of said barrel, said barrel being axially adjustable relative to said sleeve, a valve casing connected with the lower end of said sleeve, a valve seat disc positioned between the confronting ends of said sleeve and valve casing, a valve member working "in saidcasing and cooperating with the valve seat, a sample entrapping tube extending longitudinally through said barrel, being integral adjacent one end with one end of the barrel and having at said one end a point adapted lto pass axially through the apertured valve seat-disk to engage said valve member for unseating the latter, said sample entrapping tube, adjacent the pointed end thereof being perforated, a check valve on the upper end of the same sample tube, packing elements encircling said sleeve, means engaged with the sleeve for securing said packing elements in position on the sleeve, and a perforated pipe having an end alined with and connected to said valve casing. y

ERNEST H. COX. 

